code: def generate_float_feature() -> Series:
      return Series([12, 0, np.nan, 3, -0.2, 2.3, 2.3, 0.1, 5])
  
imports: import copy
  import numpy
  import pandas
  import pytest
  from pandas import DataFrame, Series
  from autogluon.common.features.feature_metadata import FeatureMetadata
  from autogluon.features.generators import AbstractFeatureGenerator
label_desc: Use image node_id 5 for calling the DataHelper obj's underlying member method code with example usage: obj.generate_float_feature() and returns: Series